Paint it black

[jamiebull1]

Run black on the whole codebase.
Added black --check . to the Travis config for Python 3.7 on linux for master and non-master branches, to fail if formatting inconsistencies are found.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (develop@d0525ae). Click here to learn what that means.
The diff coverage is 40.2%.

@@            Coverage Diff             @@
##             develop     #251   +/-   ##
==========================================
  Coverage           ?   43.34%           
==========================================
  Files              ?       89           
  Lines              ?     7556           
  Branches           ?        0           
==========================================
  Hits               ?     3275           
  Misses             ?     4281           
  Partials           ?        0

Impacted Files	Coverage Δ
eppy/tests/geometry_tests/test_volume_zone.py	0% <ø> (ø)
eppy/tests/test_bunchhelpers.py	0% <ø> (ø)
eppy/geometry/area_zone.py	100% <ø> (ø)
...ts/EPlusInterfaceFunctions_tests/test_parse_idd.py	0% <ø> (ø)
eppy/tests/test_idfreader.py	0% <ø> (ø)
eppy/iddcurrent.py	100% <ø> (ø)
eppy/geometry/mcve.py	0% <ø> (ø)
eppy/tests/test_IDF.py	0% <ø> (ø)
eppy/idf_msequence.py	87.17% <ø> (ø)
eppy/snippet.py	100% <ø> (ø)
... and 77 more

---

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[santoshphilip]

@jamiebull1 , I am going to delay this merge by a week - mostly because I am busy, distracted by another project.
please remind me if nothing happens beyond a week :-)

[santoshphilip]

• I had never used black before. I just knew about it.
• I tried it on a small project I was working on. Very pleased with the results.
• I am going to go ahead and merge.

Good call on bringing this into eppy

[santoshphilip]

I think I should add a contributor documentation with some steps like:

before pushing to GitHub do the following

• run py.test
• black ./

Do we have any "how to contribute" documentation in eppy ?
A quick look thru did not find any

[jamiebull1]

I seem to remember we worked on some contribution documentation before. It probably needs updating, and possibly merging if it never got that far.

[jamiebull1]

Here it is #86